Although we often think of sea level as being a fixed height around the world, it can actually vary by more than 30 cm (12 in.)based on natural processes.

Question

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Sea level varies around the world and over time due to factors such as gravitational forces, ocean currents, temperature, and salinity differences, which can cause variations in sea level by more than 30 cm (12 inches).

Although We Often Think of Sea Level as Being a Fixed